All the memory accesses need to be unsigned char in  order to avoid
false errors being detected.   Two new features are available for
developers to call into the M100 functionality to look for data
corruption.

Make BABYSTEP_ZPROBE_OFFSET an optional feature

BABYSTEPPING updates Z probe offset

Sanity check per-axis options' array sizes

Make ADC sensor reading frequency adjustable

Simplified M20 with size

Unify M421

Adjustments to M100

Extend RGB LED with Printer Events

Allow 10mm Movements for Z-Axis

Fix MINIMUM_STEPPER_PULSE calculations

I use the movement options via LCD quite often. Especially to get the nozzle out of the way. I see no reason, why the 10mm option is disabled for the Z-Axis, this is why i always delete this line when i compile a new version.
If this is unwanted, please just close this PR

Have M109 / M190 do nothing with no parameters

Only lcd_synchronize needs no_reentry

Save / restore z_fade_height in EEPROM

Fix mbl_mesh_report

Fix EPROM -> EEPROM

M100 had numerious changes and quit working.   Part of the problem is
the overloading of the SERIAL_PROTOCOL functions.   Also, some of the
address arithmatic was changed to use char *ptr and passing ptr into the
SERIAL_PROTOCOL functions caused them to try to print a string instead
of a number.     M100 is working again.   Let's keep it that way!

M100 has been expanded to now have a function  int
free_memory_is_corrupted()  that can be called from other code to see if
the free space is still contiguous.  It may make sense to add a flag to
control its verbose nature but right now, the extra chit chat is very
helpful to know int free_memory_is_corrupted()  is doing the right thing
and what it found at various points when it was called.     A 'Show &
Tell' is coming up with int free_memory_is_corrupted().

When PARK_HEAD_ON_PAUSE is defined Marlin won't compile because of two missing semicolon.